Sleepiness in Seattle » defer http://stanblog.jojoyao.com Stanley's Chat on the Technology and Business Tue, 21 Apr 2009 04:29:08 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Mysterious JavaScript function call failure and loading optimization http://stanblog.jojoyao.com/2007/01/mysterious-javascript-function-call-failure-and-loading-optimization/?utm_source=rss&utm_medium=rss&utm_campaign=mysterious-javascript-function-call-failure-and-loading-optimization http://stanblog.jojoyao.com/2007/01/mysterious-javascript-function-call-failure-and-loading-optimization/#comments Sun, 21 Jan 2007 18:57:40 +0000 Stanley Yao http://stanblog.jojoyao.com/newblog/?p=8 Optimize Your Scripts in DHTML Using the DEFER Attribute

When, for example, a perfect JavaScript function call foo() with the correct syntax is always mysteriously ignored, watch out for the side effect of script loading optimization. The root cause turned out to be that the script that contains the foo() function is loaded like the the following with "defer":

<script src="foo.js" type="text/javascript" defer> </script>

//foo.js
function foo() {
    document.write("hello");
}

Optimization never comes for free. Watch out for the side effects it may brings.

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